Two crucial methods for software quality assurance are smoke and sanity testing. Sanity testing makes sure that important features remain intact by confirming that recent modifications or bug fixes haven't caused new problems. It's a brief, focused inspection that happens when a new build is received. In contrast, smoke testing is the first test used to verify that a software development works as intended. Before moving on to more thorough testing, this type of testing—often referred to as "build verification testing"—makes sure that the essential features operate as intended. Both testing strategies are essential for spotting significant problems early on and saving time and money by avoiding more thorough testing on unstable releases. Because they are productive and economical, smoke and sanity testing are essential elements of agile and continuous integration processes.